Pile fabric loom



Jan. 30, 1934. H. MASON.

PILE FABRIC LOOM Filed Dec.

5, 1931 2 Sheetsj-Sheet l 'Avi/1111111111 .Y www5 T .N N R .Ea fm W w...

Jan.' 3o, 1934. H. MASON 1,945,057

PILE FABRIC LOOM Filed Dec. 3, 1951 2 Sheets-Sheet 2 mulini!" W ATTORNEY Patented Jan. 30, 1934 UNITED STATES PATENT OFFICE PILE FABRIC LOOM Howard Mason, Saxonville, Mass.

Application December 3, 1931. Serial No. 578,670

Claims. (Cl. 139-9) This invention relates to pile fabric looms of Fig. 1 is a side elevation of a portion of an the type employing tube frames, and more par- Axminster loom provided with the novel featicularly to further improvements in the contures of the present invention; struction of my Patent No. 1,845,614, granted Fig. 2 is a perspective view of an eccentric I Feb. 16, 1932, directed to mechanism for acsleeve and parts associated therewith; @oE

curately positioning each tube frame relative to Fig. 3 is a perspective View of one of the clutch the fabric during the tuft inserting operation. arms and associated parts for a tube frame;

In the Axminster or tube frame type of loom a Fig. e is a vertical sectional view through the large number of tube frames are employed to clutch arm and sleeves associated therewith;

1. present dierent colored tuft or pile yarns to Fig 5 is a perspective View of a tube frame supthe fabric in accordance with the pattern being ported in spaced relation to the front knife carwoven. The tube frames are usually supported rying frame; above the loom and are advanced in the proper Fig. 6 is a side view showing a tube frame suporder towards the weaving position by conveyor ported in one position adjacent the fabric by the chains. As each tube frame is advanced to a novel means of the present invention; and 2o predetermined position above the weaving point, Fig. 7 is a similar view showing the tube frame it is engaged by mechanism upon the loom and supported in a second position by said means. transferred from the conveyor to the tuft insert- The improvement of the present invention may ing position. be employed in connection with any form of Ax- Difficulty has been experienced heretofore in minster loom where tube frames are used in the gs accurately positioning each tube frame adjacent weaving process, as distinguished from the nipthe fabric during the tuft inserting operations, per type loom. The loom illustrated in the and means is shown, described and claimed in drawings is for the main part well known in conmy pat-ent above mentioned for accurately supstruction and operation.

porting each tube frame adjacent the fabric dur- In the Axminster loom shown the operating so. ing the introduction of the tuft yarns. This is parts are supported by the spaced side frames 10, accomplished in accordance with the disclosure only one of such side frames being shown and of said patent by mounting tube frame positioneach of these frames is provided with the uping blocks upon the front knife supporting frame right column 11 adapted to support the mechaso that the blocks will support each tube frame nism for handling the tube frames 12, which are 85 accurately in the desired position adjacent the advanced by the conveyor chains 13 towards the fabric. weaving position in a well known manner. These While the mechanism of said patent operates chains pass downwardly from` the overhead supin a highly satisfactory manner, it may be deporting structure, not shown, and pass about the sii-able from time to time to vary the lifting acsprockets 14, which may be rigidly mounted upon 9o tion of said blocks upon the tube frame. For exand driven by the shaft 15, which is rotatably ample, this may be desirable to level or true up supported by brackets 16 projecting laterally from the tube frame with respect to the adjacent the columns 11. fabric, or compensate for movement of the knife The warp threads a, b, may be supplied from supporting frame in adjusting the knife. the usual let ofi beam in a well known manner and 95 The present invention therefore, residesinsimare shifted by the harnesses 17, as usual, and 'ple means that may be easily and quickly adjusted the woven pile fabric F is advanced as woven to vary the lifting action of said blocks upon the towards the front of the loom over the fabric tube frames, and a more specific feature of the supporting mechanism 13.

present invention resides in eccentrics or ec- As each tube frame 12 is advanced by the loo centric sleeves associated with the tube frame chains 13 to a position directly below the shaft 15 transfer mechanism and adapted tc be angularly its opposite ends are engaged in a well known adjusted to vary the lifting action of the blocks manner by the clutches 19 carried by the clutch upon the tube frames. arms 20 supported by the pivotal shaft 21. The

The Various features of the invention and arrangement is such that the arms 20 may be 105 novel combination of parts in addition to the rocked slightly in a horizontal plane to move the above will be hereinafter described in conneeclutches 19 into and out of engagement with the tion with the accompanying drawings which ilends of the tube frame 12, and may be rocked in lustrate one good practical form thereof. a vertical plane to convey a tube frame towards In the drawingszand from the tuft inserting position. The rods or 110 links 22 are provided to impart the desired tilting movement 'to a tube frame while it is in the lowered or tuft inserting position. Various means have been proposed heretofore for imparting the desired movements to the arms 2O and rods 22 and in the construction shown the clutch arms 20 are rocked in a vertical plane by the cams 23 secured to the operating shaft 24. These cams 23 serve to lift the pivoted levers 25, each of which has a cam engaging roller 26, and the outer end of each lever 25 is connected to an arm 20 by a link 27. Each tube frame tilting rod 22 is operatively connected to a bell crank lever 28, which is pivoted at 29 and is provided with the operating rod 30.

The operation cf the mechanism just described is such that when a tube frame is engaged at its opposite ends by the clutches i9 it is moved downwardly by the downward rocking movement of the arms 20 to introduce the tubes 3l between the warp threads so as to insert the tuft yarns c between the warps, and a dipping or wipingin motion is imparted to the tube frame at this time by the links 22 to facilitate the insertion of the yarns c downwardly between the warps. A. shot of -filling or weft is then inserted and beaten up against the fell of the cloth by the reed 32 supported by the reed holder or lay 33 carried by rocking levers 34 pivotally supported by the shaft 35, ari-d while the lower ends of the tuft yarns c are held by the reed, the clutch arms 20 are raised to lift the tube frame so as to unwind from the spool or 'spools 36 surlicient yarn to supply the tufts for the next yarn inserting operation of this tube frame.

After a row of tuft forming yarns c has been introduced in the fabric and properly secured therein about a binding weft it is important to sever these yarns between the fabric and tube frame. This is commonly accomplished by providing Ithe cooperating knives 37 and 38. The rear yknife 37 in the construction shown is secured to the knife supporting frame 39 which is mounted upon the upper vends of the levers 40 and these levers are supported for rocking movement Aby the shaft 4l. The front knife supporting f'rar'neV 42 is secured to the upper ends of the levers 43 which are supported for rocking move- Y ment by the pivoted shaft 44. When a row of tuft forming yarns is to be severed the knife 37 is rnoved frontwardly by the actuating link 45 and the knife 38 isrocked rearwardly by the downwardly extending arm 46, the lower end of which is connected by a link 47 to the lever 48. This lever is provided with a roller 49 adapted to cooperate with a cam upon the shaft 24.

The mechanism so far described operates in a well known manner, and in accordance with the disclosure of the patent above cited, means is associatedwith the front knife supporting frame for accurately positioning each tube frame while inthe tuft inserting position.

To facilitate the operation of the tube frame 65: positioning means associated with the front knife,

the cam upon the shaft 24 for actuating the roller 49 is preferably provided with the stepped portions 50 and 5l, and the tube frame positioning means as disclosed in said patent, comprises the blocks 52 mounted upon the front knife support-ing frame 42 and adapted to cooperate with projections lor rollers associated with the clutch arms20.

As pointed out in said patent, it is found desir- A able to provide means for accurately positioning the tube frame while the first binder shot is being' bound in place, and also to provide means for lifting the tube frame an accurate predetermined distance while the tuft yarns are bound to the fabric to thereby unwind the desired length of yarns from the spool carried by the lowered tubeframe. This is readily accomplished by providing each block 52 with the arcuate surfaces 53 and 54 formed in stepped relation to each other and which preferably constitute small-arcs, the centers of which lie at the centre of the shaft 44. The radial distance between the arcuate surfaces 53 and 54 is preferably equal to the length of the tuft yarns to be .unwound from a spool 36 ready for the next tuft inserting operation of that tube frame.

The arcuate surfaces formed upon the blocks 52, in accordance with the disclosure of the above mentioned patent, cooperate with rollers associated with the clutch arms, but it is found desirable to provide means for adjusting or varying the lifting action of the blocks 52 upon the lowered tube frame and the present invention relates to extremely simple and satisfactory means to this end. A

In the embodiment of the invention illustrated in the accompanying drawings each clutch arm 20 is provided at its outer end with a rigid or integral sleeve 55 which is adapted to rotatably receive a projection or stub shaft 55 that extends rlaterally from the outer face of the clutch 19, as best shown in Fig. 3. The arrangement is such that the `projection 55 serves to support the clutch -19 upon its arm 20 for rock'ng or tilting movement. Upon the sleeve 55 is rotatably mounted an eccentric sleeve 57 and since it is desirable to secure the eccentric sleeve upon the sleeve 55 indifferent positions of angular adjustment these two sleeves are provided, in the construction shown, with cooperating annular toothed langes which serve to prevent relative rotation between these two sleeves as long as the teeth are held in mesh with each other. The eccentric sleeve 57 is preferably provided with the outer sleeve or roller 58 adapted to turn freely upc-n the sleeve 5'7 so as .to roll upon the cam surfaces 53 and 54. The .parts just described are readily held in their assembled relation by the washer 59 provided at the outer end of the shaft 55 and held thereupon by the cotter pin 60, as will be apparent from Fig. 4.

The operation of the mechanism of the present invention for accurately positioning a tube frame adjacent the fabric is such that after the clutch arms V20 have been lowered, as shown in Fig. 6, to introduceY the yarns c between the warps, the front knife supporting 'frame 42 is moved rearwardly by the cam 5l sufficiently to vforce the cam face 53 of each block 52 under the rol-ler 58 to raise the tube frame to the desired predetermined position, as will be apparentfrom Fig. 6. After the weft has been inserted and beaten up to hold the yarns c firmly in place the knife supporting frame 42 is advanced by the cam 50 to the position in which it is shown in Fig. 7 to thereby engage the upper cam surfaces 54 with the rollers 58 to positively lift the tube frame van accurate predetermined distance. The rearward movement of the forward knife 38 may be limited by the adjustable screws 61.

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In this manner the stepped surfaces 53 and 54 operate independently of the usual actuating mechanism for the 'arms 20 and serve "to lift the lowered tube frame to one position preparatory to beating up a binding weft against the yarns c, and operate tol lift the tube frame-toa second pos-ilet tion to draw oi the proper length of yarns from the tube frame.

It is found in practice that it is desirable from time to time to vary the lifting action of the blocks 52 upon the lowered tube frame. This may be necessary as a result of changing the shims 62 provided between the frame 42 and levers 43 to vary the adjustment of the front knife, or to level or even up the tube frame with respect to the fabric, and the desired adjustment is quickly accomplished in accordance with the present invention by removing the Cotter pins 60, so that the teeth of the eccentric sleeve 57 may be disengaged from the teeth upon the sleeve 55 to permit rotation of the eccentric sleeve 5'7 upon the sleeve 55 to secure the desired angular adjustment, whereupon the parts may be reassembled and secured in place by the cotter pin 60.

The rotation of the eccentric sleeves 57 at the opposite sides of the loom to the desired position of angular adjustment is facilitated by providing graduations or positioning marks 63 and 64 upon the cooperating annular toothed portions, as shown.

W hat is claimed is:-

l. In a pile fabric loom provided with tube frames, in combination, shed forming mechanism, a tube frame conveyor, clutches adapted to engage the opposite ends of a tube frame and move it from the conveyor to the tuft inserting position to supply tuft yarns to the fabric, a projection adjacent each clutch, blocks supported at the front of the loom for movement by a going part of the loom towards a lowered tube frame and adapted to cooperate with said projections to lift the tube frame adjacent the fabric to an accurate predetermined position, and an eccentric associated with each projection and adapted to be secured in different positions of angular adjustment to vary the lifting action of the blocks upon the tube frame.

2. In a pile fabric loom provided with tube frames, in combination, shed forming mechanism, a tube frame conveyor, clutch supporting arms provided with clutches adapted to engage the opposite ends of a tube frame and move it from the conveyor to the tuft inserting position, projecting means upon each clutch arm, tuft yarn cutting mechanism including a knife carrying frame movable towards and from the row of inserted yarns, blocks upon the knife carrying frame adapted to cooperate with said means to lift the tuft inserting tube frame to an accurate predetermined position, and each projecting means including an eccentric adapted to be secured to a clutch arm in different positions of angular adjustment to vary the lifting action of the blocks upon the tube frame.

3. In a pile fabric loom provided with tube frames, in combination, shed forming mechanism, a tube frame conveyor, clutch supporting arms provided with clutches adapted to engage the opposite ends of a tube frame and move it from the conveyor to the tuft inseriing position, a projection upon each clutch arm, tuft yarn cutting mechanism including a knife frame movable towards and from the row of inserted yarns, blocks upon the knife frame adapted to cooperate with said projections to lift the tuft inserting tube frame to an accurate predetermined position, and an eccentric sleeve rotatably adjustable upon each projection to vary the lifting action of the blocks upon the tube frame.

4. In a pile fabric loom provided with tube frames, in combination, shed forming mechanism, a tube frame conveyor, clutches adapted to engage the opposite ends of a tube frame and move it from the conveyor to the tuft inserting position to supply tuft yarns to the fabric, a projection adjacent each clutch, blocks supported at the front of the loom for movement by a going part of the loom towards a lowered tube frame and adapted to cooperate with said projections to lift the tube frame adjacent the fabric to an accurate predetermined position, and an eccentric sleeve rotatable upon each projection and having teeth associated therewith for holding the sleeve in different positions of angular adjustment to vary the lifting action of the blocks upon the tube frame.

5. 1n a pile fabric loom provided with tube frames, in combination, shed forming mechanism, a tube frame conveyor, clutches adapted to engage the opposite ends of a tube frame and move it from the conveyor to the tuft inserting position to supply tuft yarns to the fabric, a projection adjacent each clutch, blocks supported at the front of the loom for movement by a going part of the loom towards a lowered tube frame and adapted to cooperate with said projections to lift the tube frame adjacent the fabric to an accurate predetermined position, an eccentric sleeve rotatably mounted upon each of said projections and `adapted to be secured in diiferent positions of angular adjustment to vary the lifting action of the blocks upon the tube frame, and a sleeve roller journaled upon each eccentric sleeve.

HOWARD MASON. 

